253401209 has 2 divisors, whose sum is σ = 253401210. Its totient is φ = 253401208.

The previous prime is 253401199. The next prime is 253401251. The reversal of 253401209 is 902104352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142730809 + 110670400 = 11947^2 + 10520^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253401209 is a prime.

It is not a weakly prime, because it can be changed into another prime (253401509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126700604 + 126700605.

It is an arithmetic number, because the mean of its divisors is an integer number (126700605).

Almost surely, 2^253401209 is an apocalyptic number.

It is an amenable number.

253401209 is a deficient number, since it is larger than the sum of its proper divisors (1).

253401209 is an equidigital number, since it uses as much as digits as its factorization.

253401209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 253401209 is about 15918.5806213996. The cubic root of 253401209 is about 632.8045029349.

The spelling of 253401209 in words is "two hundred fifty-three million, four hundred one thousand, two hundred nine".